Clamping or bar-protecting apparatus.



PATENTED JULY 4:, 1905.

G. J THUST. ULAMPING 0R BAR PROTETING APPARATUS.

APPLIGATION FILED MAR. 7, 1904.

3 SHEETS-SHEET 1.

El.' El..

witnesses 858 PATENTED JULY 4, 1905.

G. J.. TI-IUST.

ULAMPING OR BAR PROTEGTING APPARATUS.

APPLICATION FILED MAR. 7, 1904.

3 SHEETS-SHEET 2.

n y (iwi t ummtm: I @n uw Hogg/iwi GLAMPING 0R BAR PROTGTING APPARATUS.

APPLIOATION FILED MAR. '1, 1904.

3 SHEETS-SHEET 3.

ltifu. 793.9595.

Patented July 1l, 1905.

arrgrv'r (Dennett.

SPEClIFUtTIOM forming part of Letters Patent No. 793,858, dated July l, 1905. Application Filed Ma1cl1'7,l90l1. Serial No. 196,944.

To all 1071.011?, it 'may colmar/1,.-

lile it known that l. (tuono n J. ln'us'it a citi Zen of the United States. residingl at Detroit,

county of Vlayne, State of liflichig'an, have in- 5 vented a certain new and useful improvement in Clamping or Bar-Protecting Ajviparatus, of which the following is a specilication, reference being had to the accompanying drawings, which form a part of this specification.

My invention has reference to an improved clamping or bar-protecting apparatus, the object of the invention being more especially l to prevent bars or tubes of metal in the process of their manufacture from bending in the process of rolling the same through the customary mill-rolls.

Vlhc mechanism constituting my invention is particularly intended to be employed in connection with machines for the reduction of tubes, as for drawing out seamless metal tubes.

My invention therefore consists in the construction, combination, and arrangement of l devices and appliances hereinafter described and claimed, and illustrated in the accompanying drawings, in which"- Figure l is a view in end elevation. Fig. 2 is a view in plan. Fig. 3 is a view in side elevation, showing parts in vertical section. Fig. et is a detail view of the clamping-jaws in end elevation. Fig. is a view in verticzl transverse section. Fig. G is a view in side elevation and vertical longitudinal section.

As shown in the drawings, t represents the red notion-rolls of a machine for the reduction of seamless tubing. rlhe machine itself forms no :feature of my present invention, as my invention is applicable to any machine of this class. A portion of the framework of such a 4.0 machine is indicated at and c denotes a piece of tubing being passed through the rolls, while (l represents a mandrel over which the tube is drawn, the mandrel lying in the axial line of the travel of the tube.

lll/ly invention contemplates any suitable framework e, provided with side bars, upon which is supported a guide way or track f, en tending transversely between adjacent poru tions of the framework. blurmorted upon said track is a transversely-movable carriage g, said carriage constructed with a fixed arm or jaw t, and to which carriage is jointedly connected a swinging jaw or clamp t', as shown at j, the two jaws being suitably recessed, so that when the swinging jaw is in closed position the tubing may pass therebetween, the clamping-jaws holding the tubing in proper alinement and preventing its bending'. l/Vhile the tubing is being passed through the reducu ing-rolls the swinging jaw is closed down upon the work, and to hold said jaw lirmly in closed position the same is shown formed with a downwardly-extended arm 7c. A re ciprocatory rod I, supported on the framework c, is provided with a lug m, which, in working position, is moved adjacent to the arm to prevent any swinging of the jaw v7, the lug m etfectually locking the swinging arm in closed position.

lWhen it is desired to remove the tubing from the clamping device, the rod Z is drawn forward to remove the lug/za from the arm z'. '.llhe rod to this end may be provided with an operating-lever yn.. To adjust the clamping mechanism transversely, so that it may engage a tubingl passed through any given groove of the reducingsrolls, the framework is provided with adjusting-screws g) p, engaging said carriage, whereby the carriage may be moved laterally in either direction.

`l/Vhile .l do not limit myself to any specific construction of the track f, ]f prefer to construct the same with lateral downwardly-depending arms r] q, upon which an intermediate inverted-U-shaped plate v' secured, as 35 by bolts s. Caps t are also shown secured upon the plate fr, as by bolts a. 'lfhe swinging jaw t' is preferably formed with a stopshoulder (indicated at In) to limit the opening movement of the jaw. When the lug fm. is moved out of the way of the arm 1, the jaw f5 may readily be swung over into open position by any suitable implement in the hand of the operator, as by means of the instrument usually employed by the operator to handle the tubing and remove it from the machine.

l have shown in the accompanyingdrawings but one clamping apparatus to engage the tubing; but I would have it understood that my invention contemplates mounting as many duplicate devices as may be desired upon the framework e, the swinging jaws all being simultaneously locked by the one bar I.

That I claim as my invention isf- 1. In a tube-rolling' apparatus provided 1 with a mandrel-bar the combination of a stationary supporting-framework, comprising stationaryr longitudinal side bars, a track exy tending' transversely oi the side bars trom one side bar to the other, and supported at its extremities upon said side bars intern'iediate ot' i the extremities thereof, a carriage movable `upon said track transverselyv ot' the side bars 1 bars oi' the frame, a carriage movable upon said stationary track transversely of the side 1 bars and means on the carriage Vfor supporting the mandrel-bar.

3. A tube-rollingl apparatus comprising in combination, a frame, a mandrel-bar, a fixed recessed jaw, a swinging` recessed jaw to close upon the lixed jaw to hold the mandrel-bar between said jaws7 the swinging` jaw provided with a locking-arm, and areciprocatory device to engage the locking-arm ot' the swinging jaw to hold the swinging jaw in closed position.

a. A tube-rolling` apparatus having,` in combination a stationary traine comprising' side bars, a mandrel-bar, a track extendingtransversely ot' said side bars from one side bar to the other and provided with depending arms at its extremities engaged upon said bars, intermediate the extremities of said side bars, a carriage movable transversely oi' the side bars upon said track, means on the carriage t'or supporting mandrel-bar, means to transversely adjust the position of said carriage upon the track.

In testimony whereotl I have signed this spccilication in the presence ot' two subscribing witnesses.

GEORGE J. THUST. IWitnesses:

N. S. IVRIGHT, M. L. SIMMONS. 

